Click on map to open large map in new window (Map updated: 11 August 2009)

Click here to view an interactive map of the Northern Ireland dataset as currently collated by CEDaR.The map is generated through the NBN Gateway using their Interactive Mapping Tool.

The thallus of this species is a pale grey, scurfy crust. The spherical discs (perithecia) are buried in deep pits in limestone so need to be excavated with the tip of a razor blade before viewing under the microscope. The colourless spores are grouped together in sacs (asci) of eight. Cylindrical algal cells are present within the discs. It is a species of hard limestones, usually at exposed sites but in County Clare, at the only locality for the species in Ireland, it was growing in a more sheltered situation.